N666U is reserved. Post-cancellation hold held by Cancelled/Not Assigned — if it isn't renewed, the FAA releases it on Jun 8, 2028 (in about 1.9 years).
Checked against FAA data from Jul 1, 2026. Not an official FAA determination — always confirm with the FAA before filing.
This tail was recently cancelled. The FAA holds cancelled N-numbers before releasing them back to the public.
Reservations lapse more often than you'd think. Check back around Jun 8, 2028 — if the holder doesn't renew, it becomes available. See everything scheduled to free up in June 2028.
N666U has been worn before. Past registrations from FAA deregistration records:
Tails one nudge away from N666U that aren't assigned or reserved: